Before we explain sleep apnea, let's quickly break down how breathing works. When you're awake, the muscles of your throat act to keep the airway straight and open so air can flow in and out of your lungs. When you sleep, these same muscles relax and your throat gets narrower. Normally, this doesn't close the airway, it just slows down breathing during sleep.
A male chicken under one year old is called a cockeral. A male chicken over a year old is called a cock, or rooster. A female chicken under the age of one is called a pullet. A female chicken over the age of one is called a hen. Not all chicks are hens. Chicks can be cockerals or pullets.
Usually the rooster is given a weapon that has a lot of fire power and sometimes this weapon is given the name rooster as well. The expression has been popularized from a song by Alice in Chains called Rooster. Snuff the Rooster is an old expression meaning to extract a rooster from a hen house. Roosters are very territorial birds and highly protective of hens.